#include <iostream>

//类型不明确
//#define Max 100

//编译期定下来
const int Max = 100;


void func(int a)
{
    std::cout<<"int"<<std::endl;
}

void func(short a)
{
    std::cout << "short" << std::endl;
}

int main()
{
    //空指针
    //func(nullptr);
    int a[Max];
    func(Max);
    return 0;
}